XML 36 R25.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Asset Retirement Obligations (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2017
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Asset Retirement Obligations | The following table summarizes the changes in the Company’s asset retirement obligations (“ARO”) for the nine months ended September 30, 2017 (in thousands):
Asset retirement obligations at January 1, 2017 | $ | 7,226 |
Additional liabilities incurred | 1,813 |
Liabilities settled | (65 | )
Accretion expense | 376 |
Revision to estimated cash flows | (22 | )
Asset retirement obligations at September 30, 2017 | $ | 9,328 |

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration